<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Entry.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Reader_Extension_EntryAbstract
 */
require_once 'Zend/Feed/Reader/Extension/EntryAbstract.php';

/**
 * @see Zend_Feed_Reader_Extension_CreativeCommons_Feed
 */
require_once 'Zend/Feed/Reader/Extension/CreativeCommons/Feed.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Reader_Extension_CreativeCommons_Entry extends Zend_Feed_Reader_Extension_EntryAbstract {
	/**
	 * Get the entry license
	 *
	 * @return string|null
	 */
	public function getLicense($index = 0) {
		$licenses = $this->getLicenses ();
		
		if (isset ( $licenses [$index] )) {
			return $licenses [$index];
		}
		
		return null;
	}
	
	/**
	 * Get the entry licenses
	 *
	 * @return array
	 */
	public function getLicenses() {
		$name = 'licenses';
		if (array_key_exists ( $name, $this->_data )) {
			return $this->_data [$name];
		}
		
		$licenses = array ();
		$list = $this->_xpath->evaluate ( $this->getXpathPrefix () . '//cc:license' );
		
		if ($list->length) {
			foreach ( $list as $license ) {
				$licenses [] = $license->nodeValue;
			}
			
			$licenses = array_unique ( $licenses );
		} else {
			$cc = new Zend_Feed_Reader_Extension_CreativeCommons_Feed ( $this->_domDocument, $this->_data ['type'], $this->_xpath );
			$licenses = $cc->getLicenses ();
		}
		
		$this->_data [$name] = $licenses;
		
		return $this->_data [$name];
	}
	
	/**
	 * Register Creative Commons namespaces
	 *
	 */
	protected function _registerNamespaces() {
		$this->_xpath->registerNamespace ( 'cc', 'http://backend.userland.com/creativeCommonsRssModule' );
	}
}
